Spam is a problem, but a very different one. Spam is often malicious/harmful. Accessing a publicly accessible website is usually benign even if the content being accessed gets saved to disk.
Some people don't publicly publish their email address, they instead selectively give it out only to those they want to get email from, but their address gets leaked/sold and abused. Ultimately people who do publicly publish a contact address (email or even a physical mailing address) are basically on the hook for deciding what to do with whatever people send them.
The spam situation got out of hand pretty fast though. The only thing that kept email spam from reaching the level of a DoS attack were blacklists and server-side filtering, and even with those things (plus client-side filters) spam is still a huge problem today. Spam is just a much bigger problem than web scraping. Even the junkmail the mailman delivers to my door has an environmental cost that's much worse than the "harm" of a web scraper's http GET requests.
We have many alternative ways to contact each other online that aren't as vulnerable to spam, but for all of its shortcomings email continues to be widely used because at the end of the day people think giving strangers the ability to reach out to them uninvited is valuable. Anyone can set up a whitelist and trash everything that comes into their mailbox unless it's from an approved sender, but almost nobody does because they want to be more reachable than that.
Some people don't publicly publish their email address, they instead selectively give it out only to those they want to get email from, but their address gets leaked/sold and abused. Ultimately people who do publicly publish a contact address (email or even a physical mailing address) are basically on the hook for deciding what to do with whatever people send them.
The spam situation got out of hand pretty fast though. The only thing that kept email spam from reaching the level of a DoS attack were blacklists and server-side filtering, and even with those things (plus client-side filters) spam is still a huge problem today. Spam is just a much bigger problem than web scraping. Even the junkmail the mailman delivers to my door has an environmental cost that's much worse than the "harm" of a web scraper's http GET requests.
We have many alternative ways to contact each other online that aren't as vulnerable to spam, but for all of its shortcomings email continues to be widely used because at the end of the day people think giving strangers the ability to reach out to them uninvited is valuable. Anyone can set up a whitelist and trash everything that comes into their mailbox unless it's from an approved sender, but almost nobody does because they want to be more reachable than that.