Yeah, but TOS+ do things like have the Enterprise to to the edge of the Galaxy and then later have "We won't make it there in time!" stories.
So it's the same problen, inverted.
But they didn't lay out the numbers for the audience to calculate like Voyager
did (or had the ability to). Would it have hurt the writer of 'The 37's' to take a few seconds to do a calculation before blurting we go "four billion miles a second!"?
The episode "That Which Survives" is the only episode that makes the mistake claiming the Enterprise can travel 997.4 light years in 11.37 solar hours (whatever that is). But the premise of Star Trek
didn't hinge on those numbers making sense like Voyager