Yeah, this is definitely more along what I mean. It isn't that he doesn't think Lavellan is strong, its more like: "Do I really want someone I love to come with me on this one way trip off a cliff?"
That always seems a bit self-absorbed to me. "Well, of COURSE she loves me SO MUCH she'll want to come too! I can't let her do that, there's too much pain." Some Lavellans would. Others would probably be all, "Look honey, I love you and stuff, but I got a life and people here I'm responsible for. Write me if you can, I'll miss you. XOXO."
Which I guess is why they gave the option to go through the eluvian with Morrigan in Witch Hunt if you romanced her, but also the option to just up and say "good luck" otherwise.
I dunno. Just the idea that it's a "protection" thing is irritating, not because it removes Lavellan's agency in the matter or makes her seem weak, but because what we know suggests it's less about that and more about Solas and his overall goals. It kind of obfuscates him and the decisions he makes and turns it into overly-dramatic romance cliche. I guess to me... it's just more complicated than that?