virtualenv is so much less user friendly than npm. Like why do I have to run a `source` command to make virtualenv work? I don't use either often, but I can r

virtualenv is so much less user friendly than npm. Like why do I have to run a `source` command to make virtualenv work? I don't use either often, but I can remember how to use npm if I haven't used it in like 6 months, but I have to look up the right commands virtualenv if I haven't used it for like 2 weeks.