I'd like to comment too
https://forexintuitive.com/attachments/1529664426.png
Trendlines have a particular definition or specifiion, and when drawn and interpreted properly, according to the spec, they are imo the most precise and quickest indior for trading. And trading is easy in contrast to a scenario in which you try to interprete several indiors. Analysing transactions, learning from mistakes and enhancing your trading program is much simpler if you have a few variables to take into account.
This is only my experience.
On the other hand, if tls are attracted in an ad-hoc manner, I wouldn't call them trendlines in any way, instead sketchlines or anything, but not trendlines. Then they clearly serve a different purpose than tls.
R