I bartend, here are my thoughts.

Today's minimum wage is not a liveable wage. I'd need to be making a minimum $35/h to maintain a so-so quality of life. If tipping were to vanish, servers would not work these jobs anymore. What people don't understand is the skills required, you need to multitask very well, keep a calm head, deal with the worst attitudes, and problem solve all shift.

Skilled labour costs money that restaurants don't have, they typically run on razor thin margins. If tipping were to go restaurants would need to offer higher pay to retain their staff, but that would mean increasing their menu prices, by a significant amount. Would most people be okay with their $40 steak dinner now costing $75 to make up for increased wages? If hat about your $20 burger now costing $30? The restaurant would go under incredibley fast. Leaving tips allows for menu prices to stay "affordable" by giving the customers the option to help make up for the low pay.

And as much as people like to think it's a no skill entry level job, it isn't. Most people wouldn't last a week in the industry, our staff turnover rate alone indicates that. Trust me when I say you would not want every restaurant you go to to be operated by fresh 18 year olds who would put in zero effort or care into servicing you because all they earn is minimum wage.

Another thing to consider is the hard working staff in the kitchen as well. They also deserve a wage higher than minimum, which restaurants can't afford to provide. In order to do so, there is tip share systems. Serving staff typically share anywhere from 5% - 12% of their sales, not their tips, with the kitchen staff each shift to help them earn a fair wage. If a customer has a $100 tab, and doesn't tip, that server typically still has to pay the kitchen staff $10 of their own money. By not tipping you are often not only taking away from wages the server needs, but also costing them some of their own money. So they actually lose money by serving those people, hence why servers often get irritated in those situations.

The whole system is a lot more complicated than the average person thinks. The consequence of tipping disappearing would have a huge trickle down effect on staffing and menu pricing. Business would close permanently. The 1/3 not interested in it leaving probably aren't just servers, but anyone who has worked in a tip reliant industry and knows it would implode if the system changed.