Let me give an example to be clearer: Rogue One (2016) was a direct prequel to SW: A New Hope (1977), made 39 years after the latter, but has sets, props, costumes, models etc. that are exactly the same as the film it is a prequel of. Why? Because the producers specifically made R1 as a prequel, so it needed to exactly match what we saw in ANH in every way. It was completely believable that this movie made with the production values of 2016 was able to recreate the same look and feel of a movie made in 1977.
Now contrast that with DSC. It's clear that the show, while visually stunning and using the newest production values available, does not even remotely try to look and feel like the 50+ year old show it's supposedly trying to be a prequel of. And it's not like they couldn't have tried, since R1 pulled it off just fine. It's almost as if it wasn't originally meant to be a prequel to TOS, and that someone just made that decision later in the process after production was already commencing (No, I'm not implying that that's what actually happened. I'm just saying that's what it felt like to me.)
So when I said "a show produced in 2018 with 2018 production values that claims to be a prequel to a show produced in the '60's with '60's production values is rather silly," I meant that there was literally no effort to use those 2018 production values to recreate the look and feel of TOS, and instead made a show that looks and feels more like it takes place either post-TUC or even post-TNG (again, my opinion). As I stated before, I like DSC on its own merits, I think it looks great, and I hope that it continues and gets better. But to me, there's nothing about it that remotely makes me feel like it takes place ten years before TOS, which is what the show is advertised as being. And really, I don't need it to look like TOS. I just need to treat it like the reboot that it actually is.