No, more mining equipment wouldn't lower the fee. It would just lower the income you make from mining. Bitcoin targets a block of a limited size every 10 minutes. If more people are mining it adjusts the difficulty to bring it back to 10 minutes.

I agree that Bitcoin will not scale to handle the global population. People will be on spread out over many different projects and people able to route through them. Of course this will all be hidden from the end user. I do believe cryptocurrency is the future of money. Most people will just be holding stable coins pegged to the dollar and they won't even know that it's a cryptocurrency. They will just refer to it as a dollar since it's abstracted away.