Returning players like midfielder Timoci Seruwalu (leg cramp) and lock Josh Lane (ribs) had to come off after lifting Whanganui with their experience, while centre Josiah Bogileka, covering for an unwell Kameli Kuruyabaki, was slightly hobbled by a sprig down the leg.
This left gaps in the line, as reserve prop Jordan McFarlane stunned everyone by snatching an intercept on his own 30m and outrunning the cover to give his team a hope at 33-31, and then, despite Whanganui securing possession and clearing down into Taranaki's pocket, Harry Symes and Sinclair still had reserve fuel tanks.
Other standouts for Taranaki were double try-scoring skipper Cole Blyde at No8, along with openside flanker Connor White.
For Whanganui, Peter-Travis Hay-Horton made a welcome return to lock as he and Lane introduced some grit back into the pack, while flanker Jamie Hughes stepped up after receiving the captaincy, and without Roman Tutauha (ear infection), hooker Jack Yarrall had an excellent opening quarter, setting up the first two tries.
It was the return of the prodigal son as 2021 debutant Ezra Malo, son of Whanganui legend Ace, was back home after a season of Hawke's Bay club rugby and looked sharp with a try and two conversions.
But Malo's vigour only threw further light on the fact the rest of the squad have not had a club season of equal length and intensity to condition themselves for a higher level.
When the above players were subbed or helped off hurt, their replacements were unable to hold Taranaki back, after the visitors had not played especially well either, with a lot of handling errors over the first three quarters.
"We're putting the work in, it's just the accumulation of work that we're not used to," said coach Jason Hamlin.
"When we got down there in the first half, we were scoring points, but we didn't get there enough.
"We actually manufactured some really nice tries. But the thing, unfortunately, and I've been telling them this for the last month, was our fitness levels aren't there.
"Our club rugby hasn't prepared us for what these teams are bringing us, and that sort of came to bear.
"You know it, and accept it, and we're asking people to come on in the last 10 minutes and add something to the game, and today we didn't hit the mark on it."
Leading 33-12, Whanganui stayed in trial mode by making changes and continuing to move the ball, or make barge carries off the ruck — rather than looking for territory and kickable points — whereas Taranaki went into shield mode by keeping players who had done well on the pitch, such as Symes switching from winger to fullback.
"The last two games of the pre-season, we'll start taking points when they're on offer, so it gets us in that mindset for the start of Heartland, so we can build our fives and sevens to 10s [points]," said Hamlin.
"That might have bought us a bit of time if we'd taken a kick early, might have put us out [of reach].
"We were creating things — should we have been a bit more aware of people coming into the line?
"Probably, but you're asking them to play footy — we were defending on the line for 15 phases before they scored their first try."
It was a shame to finish on a downer on what had otherwise been a good training camp for the squad, coming together on Friday morning.
"Got quite a big list of things to tick off, don't know if we ticked them all off but we got a long way there.
"Had some people come in around team building, some non-rugby stuff, so that was a bit of fun, got the boys engaged in it."
