Totally. One more to add to this list (for tech employees) - even if an employee writes awesome code at work, there is no way he/she can show it to future pros

Totally. One more to add to this list (for tech employees) - even if an employee writes awesome code at work, there is no way he/she can show it to future prospective employers, as it doesn't belong to them (at max, they can show their employer's website/product and say "I worked on this"). All this makes side projects very attractive