The reviewer's function is to determine whether an article is suitable for publication in a given journal. If your manuscript deviates too far from their assessment of what is expected for that journal, they will call attention to that.
The first thing for you to check is whether the editor explicitly mentioned this criticism in her or his response to you. If not, you can contact the editor by email and ask how important this is. Note, however, that not meeting a researcher's objection is likely to have a negative effect on how that reviewer responds to any revision that you send in later.
There are some general principles of academic writing style which are worth understanding and following, even if at times you choose to break them. They tend to help your writing to be clearer and thus improve the quality of your argument.
A major review can be an excellent opportunity to improve your writing style, not just improve your article. Thus it can be an investment for your future.
In general, I am happy to respond to the quirks of some desired revisions that crop up in the review process because it smooths the publication process. My concerns with reviewers comments usually begin when the reviewer is not addressing my work, but rather addressing the work that s/he wished I had attempted.