I'm a project manager - my days are insanely busy. Like working 9am to 9pm kind of busy. Not excessively complicated, but just a stupidly high workload. In my old job I was in pre-clinical research science and it was much more relaxed. Honestly, I'd rather be super busy than bored, but some days I just want to say fuck it all to the crazy workload and pack it in.

Power to you if you're content in your current job - it may supremely benefit you to be in a quieter job if that's what works for you. But for me personally, there's comfort in the chaos of the new job - in that I felt I was stagnating a bit in my old job and the busyness of the new job is validating in a way. To each their own.