Modelling in 00 gauge is a choice, not a "make do". Make do is all that's really been the option if you choose to use that scale and if you find kit building a challenge too far from the point of skill or time.
You're quite correct, Finetrax have a very limited range at the moment, but based on their n gauge range, I'm confident that it will expand far quicker than Peco's one turnout in 00 bullhead.
The turnouts are quick and easy to build so the two constraints that might limit their use (time and skill) are taken care of.
However, as I said earlier, they are infinitely more flexible in terms of being able to manipulate a formation rather than making do with set track points.
I have built layouts with my own hand made formations in EM and 00, using many techniques but for this layout I opted for Peco bullhead because they look convincing, because of the speed of the build and because of the promise of an expanded range.
That promise was long before the pandemic so to cite the difficulties of the last 18 months is being selective with the fact. More than two years ago I fitted Peco current diamonds as a temporary measure. However good the running and operation, I think they look aweful.
So, as I have said, I have already ripped up the Peco bullhead and will rebuild with Finetrax because of my confidence that the range will grow very quickly and because of what I expect will be a more flowing set of track formations that better reflects the real thing.
Just my humble opinion but at the end of the day, it's only a train set. No more or less important than most other things that make life enjoyable.