>Strongly worded letters to one's Congressperson are the equivalent to "thoughts and prayers". It doesn't matter how just (you think) your cause is; it will never achieve anything.

Your assertion isn't supported by, well, anything. The problem is that constituents think they can't affect their representatives' positions. They can.[0][1] Especially if there's a concerted effort to do so.

For every constituent who writes/calls/emails, there are at least a half-dozen more who feel the same way.

The problem isn't that contacting your representatives isn't effective, it's that by not doing so, you're ceding power to those that do.

[0] https://act.represent.us/sign/does-calling-congress-really-w...

[1] https://americansofconscience.com/calling-congress-still-mat...