Just to give an example where activate is needed, if you have the tool programs `a` and `b` installed in the venv, and `a` invokes `b` (invokes as opposed to im

Just to give an example where activate is needed, if you have the tool programs `a` and `b` installed in the venv, and `a` invokes `b` (invokes as opposed to importing python modules), then: .venv/bin/a wouldn't be able to invoke b without activating the venv or otherwise putting .venv/bin on the PATH.