The phrase "for constructive purposes" means with a goal or intention to create, build, or improve something. It implies that the actions taken are intended for positive outcomes and not destructive ones.
Sentences with «constructive purposes»
Only later, do bacteria, now immune to D - amino acid toxicity, start to make D - amino acids for constructive purposes. (sciencedaily.com)
What constructive purpose is served by calling people who did the best they could «stupid»? (arichlife.passionsaving.com)
Competition and experimentation can serve constructive purposes. (washingtonpost.com)