I have been fooled by companies selling other perks of the company, but the actual day-to-day was terrible because of terrible code.

I've also been sold on intentions to improve the code, but which never panned out after 6 months because shipping features was still the foreseeable priority. You can sometimes find honesty up front like "we know it sucks but we're going to improve it" but that goes back to selling intentions with no real solid date for that effort. It might work out, but it's a gamble for a candidate.

Plus you also get to see incidents, how they write tickets, and sprint volatility and how much stuff gets pulled in/pushed out because priorities change rapidly (there's probably a proper PM term but I can't be arsed).

It would stop a lot of people joining, realizing it sucks, then doing their year and getting something else. Then they might actually have to improve their shit instead of burying the facts.