Same Title and H1 : is it bad?

Hello WP friends,

with the site seranking.com, I have just analyzed my site and it tells me:

Issue description
By having the same and <h1> tags, you’re missing out on the opportunity to present the web page from different angles and incorporate other relevant keywords. In addition, search engines can interpret the fact that you have identical <title> and <h1> tags as a sign that the page is over-optimized.
how to fix
Use different texts in the and <h1> tags.

Except by default WordPress uses my H1 for the title tag,
so does it really matter?
do I have to use a plugin to change my titles?
From my research online not really but I feel like there is no consensus!

Thanks in advance!