Honestly, I don't mind having the option to see titles that are similar to one I'm interested in, but I'd like to seek that information out myself instead of having it provided to me on a platter (read: shoved in my face, in a way that feels kind of like adding a sidebar banner ad).
I like having the clickable "Recommendations" option in the same page element where I can find things like the Related and Art sections. I very much do not like having those related titles present on the primary view of the title page, as at that point it's just ADHD bait (and I already have way too many tabs open).
Right now, my user experience is as follows:
I scroll down the page, and my nervous system gets lit up with some minor stress as the soothing slate grey color scheme is suddenly interrupted by a block of bright colors and illuminating whites. With my focus already disrupted, my ADHD latches onto attention-grabbing pictures and titles, and I wind up opening some in tabs to maybe check out later. All this before I even get around to reading the manga I'm currently on (and, thus, being able to close the tab).
A much more enjoyable user experience for the recommendations feature would be something like this:
I scroll down the page to find wherever the latest chapter read marker is (or the first chapter in the title, if I haven't started reading it yet) and open it, without coming across anything that unreasonably contrasts with the existing title page visuals.
Later, after reading the manga, I decide I really liked it, or at the very least that I'd like to see more things like it. I see the "Recommendations" option next to the Art or Related button, and I click on that to find a list of titles that are similar to the one I've just finished reading.