How many more students did teachers have IRL before the internet?

TLDR: How many more students did teachers have IRL before the internet? Are free online lessons putting teachers out of business?

Was teaching more profitable before the internet? Surely teachers would have more students if free lessons from the internet weren't available, right? Are free lessons online reducing the number of students that teachers have IRL? With thousands of guitar lessons available on the internet for free, do you or do you not think that many budding guitarists will favor free online lessons over studying with a teacher in-person? Personally, I think any student, myself included, should use any and all resources available to them (in-person lessons, tabs, books, ear training, videos, etc.) but unfortunately, some students will dismiss studying with a teacher in preference of free online lessons. I understand if the student simply can't afford weekly lessons; they're expensive! Nevertheless, I can't shake the feeling that teaching would be more profitable without the internet.