• You will spend your entire career chasing trends.

Depends on the language, that's mostly a JavaScript/typescript issue.

• The market is volatile. People are constantly getting abruptly laid off. SD has never been very stable, so you should plan on getting a new job every few years.

Depends on the country, where I'm from there has been very few layoffs.

• Software companies are constantly looking for ways to make SD easier. As a result, your value will decrease over time, in preference for bootcampers and 2 year degree graduates.

Not sure what to say, I haven't felt my value decrease. All I see are bubbles saying they will replace me.. and then they burst.

Nobody listens to developers. Your manager's beliefs about SD come entirely from consultants, magazines, and Elon Musk tweets.

Agree but that's more of an engineering wide problem, specially when you get managers with very few engineering experience. Take the Apollo landings as an opposite example: great managers that were great engineers.

• Nobody cares about quality software. If you take the time to make your code efficient and lightweight, all your manager sees is you taking longer to make something than your peers. After all, we can just raise hardware requirements if the software is slow.

This is a bit too generic to argue against. You can get that in electrical engineering no? If you take more time designing that PCB because you want to better place the components to improve heat dissipation, will your manager care in the end?