My call -
I think it depends on how it was shut down last. Has it had reasonable
oil change intervals before shut down? Has it been fed a lot of 100LL?
Has it been stored under high humidity conditions? Why replace seals?

All are possible considerations but none are necessarily deal killers
in my book. Pull the plugs and do a visual inspection of the cylinders
with a small light dropped thru the opposite plug holes. Assuming it
looks reasonable, change the oil, drain the fuel & the carb bowl,
preheat the crankcase so the startup oil is warm, and go for it.

This engine is closer to being bullet proof than any other. Cam
failure due to corrosion might be a problem so I would check the oil
screens & immediately get an oil analysis sample after a short first
flight.

I have a 172M that at 31 years & 1700 hrs since new still doesn't use
oil between changes. If it did or had any other negative symptoms, I'd
be overhauling it. It never sat for more than a couple of months at a
time though.

I'm sure others will have an opposite opinion. Let us know what you do
& how it turns out. Good luck!