In my opinion it's a really good idea to practice WOT every so often or once a month - I'm not recommending to others to redline it that often but WOT is a good practice. I have no issue with redlining frequently. It is especially so if you are under warranty to do both, WOT and redlining the engine. Engineers designed the BMW engines to be durable past the stress you can by going WOT and redlining it. Just be sure the engine is at normal operating temperature. If the engine has any defects you want them to show up under stress under warranty.

I've done this with all my cars for years - never had an issue except on one high mileage >100k car, 1960's vintage engine - I was trying to remove carbon build up and I knew an engine rebuild was in the cards. I speeded up the end of life to that engine, there was still no catastrophic failure.

Will it hurt NOT to run at WOT or an infrequent redline? Probably not with today's engine management, higher quality oils etc. Are you getting as much fun out of your vehicle if you don't? Nope. Enthusiast vs. driver view?