Well, being active on the forum actually will make yourself grow as a more informed individual due to the number of threads discussing problems people face while buying/selling on Fiverr. Just by reading most of the threads here, you can memorize the points in the ToS people ignore the most or how long CS actually takes to get back to you during this Covid season or how your gig rank fluctuates, etc.
If that is what you meant by “growth”, then by all means, it is true. If you mean it will improve your gig rank and impression, no. If you mean getting more orders… that depends.
If you follow the good suggestions on the forum on your ethical conduct, proper business language, and how you present your gig and yourself, I personally think it would improve your chance of getting a job compared to if you haphazardly spam offers with copy-pasted wordings and/or doing unethical practices - which is unfortunately prevalent among some sellers here.