That's not how you train, Anon. Aerobic endurance has to build up over time, you can't just slam yourself with 600-700 miles a week and expect to get in the Tour de France.
If you read about how cycling training works, you'll see that everything you do is built on a foundation of Aerobic Endurance. That's what Base Training is for, and that's what you spend 3 months in the off-season doing: building up your Aerobic Endurance. Once you've done that, then you add higher-intensity work, at and above your Anaerobic Threshold.
Interval work at your Functional (Anaerobic) Threshold power, and a medium-low cadence, builds Muscular Endurance, which is what allows you to ride fast for longer periods of time (such as: long climbs like mountains, or time trials).
Anaerobic Endurance interval training (i.e., above your Anaerobic threshold) raises your VO2max, which raises your Threshold power as well (read as: you go FASTER).
Power Intervals train your Type 2 muscle fibers to be stronger and have better endurance (and your Type 1 muscle fibers, to a certain extent) so your sprint and explosive power improves.
One of the most important aspects of training is identifying areas you're deficient in, and planning your training weeks to address those 'limiters'.
Some guys """just ride""", go on lots of fast group rides, and while they may improve, they miss out on the benefits and advantages of targeted training. Some guys don't 'train' at all, relying solely on natural ability; those guys rob themselves of winning races that otherwise might have been easy, because they refuse to have a plan or anything like discipline.
Get yourself a copy of The Cyclists Training Bible and read through it, it explains all the above in detail, including how to work out a training plan for yourself.