Yeah, there's more to Internet choice than off-peak bandwidth. I have decent 5G towers nearby, but they're at a local park and get high traffic when there's city sports, festivals, etc going on. My wired Internet (muni ISP) is consistent always, I've never seen a slowdown, just a few outages each year (hopefully going away with our fiber overhaul starting this year).
Yeah, if you want to use 5G, go for it. I just don't think it's as good as wired Internet most of the time, even if you need to deal with a crappy cable company. But maybe it's good enough for your use case.