Transmission is good precisely because it does one thing and one thing really well - download torrents. No other crap, spam and non-related garbage required.
It does not do it very well (no sequential downloads, tracker scanning etc) and others like qBitTorrent also do not come with spam nor unrelated garbage, only μTorrent does that.
I get what you mean, but none of those downsides to Transmission are just "downloads torrents". So yes, it does do that very well, outside of special circumstances...