Howdy, and welcome to the Farm!
It's not necessarily required but if you want to maximize your yield and end product quality, there's a lot of factors to consider. People running higher EC/PPM are doing so because they're running high powered lights, controlling their environments and usually/possibly supplementing CO2. These plants can eat quite a bit when all those factors are dialed in properly. I can get a whole lot more detailed about the processes, VPD, PAR/PPFD, etc. But I'll just keep this short and sweet
Like many things in life, gardening/growing is a constant learning process and we should always be willing to learn, adapt and improve our knowledge and methods.