Re: So in a future distopean world
No. Because:
Children still can't give consent and paedophilia will never be acceptable enough to legalise.
This is a problem today because people getting a criminal record check for a job could be refused for having a criminal record, or have their employer know they're gay while interviewing, which could harm their chances of recruitment as it's still seen negatively by a portion of the population.
Also the dangerous/slippery road argument is pretty much always a ridiculous hypothetical