That's a problem in some ways. Lego alternatives are legal and simply competing products. Continuing to equal a whole product category to one brand is not helpful. It might have been a colloquial decision and be fine like you suggested. Unfortunately, Lego takes legal action against such attempts.

I understand the intentional misnaming of competitor products as Legos (not "Lego" mind you) in this incident, but the lawyers advocated for a video takedown. And I feel this community could be threatened by this as well. https://www.lto.de/recht/hintergruende/h/held-der-steine-lego-abmahnung-gattungsbegriff-markenrecht/ Unfortunately it is in German, but it continues a very detailed lawyer's perspective of what happened there.