Lance Armstrong had a purpose in mind (winning the Tour de France) when he rode up Alpe d'Huez. Was he commuting?

The average suburban family has a purpose in mind (recreation and spending time together) when they take a spin on the local MUP. Are they commuting?

Someone who rides a bike for exercise has a purpose in mind (fitness). Are they commuting?

I agree with OP. "Commuting" has a meaning. I don't mind that there are a lot of utility cycling posts in this forum, because they have so much in common in terms of gear, riding environment and other issues, but it's not too much to ask that people not label it "commuting" every time they get on a bicycle to go somewhere.