Thanks for voting and commenting on this issue. Your feedback is key to helping us understand how you use JIRA so we can continue improving your experience. We have reviewed this issue over the last few days.
We are certainly working to make JIRA more flexible on a per-project basis so that it's easier for a variety of teams to adapt it. Voting and watching certainly fall under this category. While this issue is not currently on our roadmap, we do hope to address this in the future.
Please don't hesitate to contact me if you have any questions.
Principal Product Manager, JIRA Platform