Buying games is not saving money.Most games are big time commitments, you can only play one at any given time. Comparisons with other forms of media entertainment fall flat on their face and will continue to do so unless the delivery method for gaming changes and becomes more episodic in nature.
There's more money to be saved in being selective about what you purchase and waiting for sales to purchase said games instead of mindlessly jumping from hype train to hype train.
I spent alot of money on games that were on sale, and never played them since I bought them.
That was a waste of money.
For example, PS+ allows you to get 36+ games a year. That is more than what you can play. All it cost is 1 premium game a year. You have the chance to get 2-3 premium games from that list.
Games are worth your money, if you can play them. Ownership is a meaningless, if you don't have time for them.
Whether you get the game from a sub, buy them or get them for free, you will need to make time for them. Plus you are not required to play games day1. You can get a huge value if you wait for a dlc drop for full experience.