Narrowly, yes you are correct. The comment I was originally replying to was:

Didn’t piefed came with built-in echo chamber features, hiding downvoted comments by default and marking people who get downvotes with special marks?

I think in that scenario bans because downvoting patterns would be far more aggressive

Which is how we got into whether those features create echo chambers (as Lemmy already provides for as well) rather than facilitate user choices. I was pointing out how PieFed mods have one additional option beyond what Lemmy mods have: the ability to not remove a comment or post even if it is controversial and thus highly downvoted, knowing that they can rely upon the end users (those that want to) using those filters to ignore the content. i.e. PieFed allows mods to be more lenient, if they so choose, the very polar opposite of an “echo chamber effect”.

Any system still allows for abuses, of course, and PieFed’s all the more relies upon detection of systemic abuses. Although so too have several apps - I am not sure which ones offered such automatic hiding and removal features (perhaps Sync and/or Connect?) but its offering by PieFed was not entirely novel.

Furthermore this is an age-old problem: how to detect and remove spam while preserving legitimate content, how to filter pornography while allowing proper e.g. medical uses, how to stop cancerous cells while allowing the body to heal using cell division normally? Nothing will ever be perfect. Anyway, PieFed provides some features, which people can choose to use or not, as they please. I have argued that no they are not actually “built-in echo chamber features”… even while yes they can be abused towards that end of the spectrum (hence my original answer, “Yes, and maybe, plus no.” - which was not intended to be entirely comprehensive, even if it did delve a bit into some details).