Not who replied to you originally but,

You aren't wrong (you even stated that more is probably better) , just not necessarily presenting the whole picture.

Ram compression isn't a benefit only scenario, there is a cost in processing power to make that happen.

So it's a trade off of memory utilisation vs processing requirements.

Whether or not it's worth it is down to circumstance, though i agree that generally i think it's worth the tradeoff.

Unified memory is useful in specific circumstances, most notably LLM/ML scenarios where high vram utilisation is part of the process.

It's not an apples to apples comparison by any means.