Idiot box used to be the TV.
The issue with CGI is a bit complex. We see it all the time in ways that are completely unnoticeable. And the reason CGI is so bad is partially an artifact of producers refusing to stick to a vision; they are constantly asking for changes and digital effects houses can't tell them to go fuck themselves if they want to ever work again. It's an absolutely brutal business. The CGI house that won an Oscar for the Life of Pi went bankrupt the next year. So what you're seeing with bad CGI is probably the crunch work of the week before opening day. That was the story of The Flash.
That said, CGI is often just the cheapest tool for the job, but often not the best.
Two videos that cover this: No CGI is just invisible CGI: https://www.youtube.com/watch?v=7ttG90raCNo
and
a comparison of Carpenter's The Thing (practical) and the remake. Thesis: we know the practical effects are fake, but we know the CGI is not real: https://www.youtube.com/watch?v=7ttG90raCNo