Yet the smart people at Pedros (just the two of them) had the brilliant idea to make a tool to hold it and having used it I can say with 100% surety it is a very handy and very useful tool. I have taken off plenty of bottom brackets and had the tool slip without it so having that tool makes life easier, like a 3rd hand (or 4th hand tool).

If the bottom bracket installed was installed properly and has been checked regularly and the splines are deep then no you won't need it but for a bike that has been poorly maintained or never had the B.B. touched and might not have had much if any grease you will appreciate the tool as I have many times.