I've always thought this was the case. I quit a job last year, and a large part of it was the 8:30 AM standups where our CTO would stress us out with customer woes and deadlines not entirely relevant to the current sprint. Instead of moving these issues through a process that resulted in better-defined deadlines and requirements, it just felt like we were perpetually behind, and it happened every single morning. Many technical leaders are stressed, but it makes everything worse when your anxieties leak in to your team every day.