I assume you're referring to the LP 3P500? Yes.. On no til drills they need the weight because you have no til coulters as well as the openers. Unless you're planting into concrete, they really aren't needed. Even Bill Winke (Sponsored by RTP for a while) took them off his Genesis and sent them back because he claimed they were useless for him. Upside - This gave his drill even more weight on the openers.
Most farmers now that use planters in no til situations, will ditch the front (no til) coulters, so they can get more down pressure on the single set of openers. Even with HD downpressure springs, pneumatics, etc. If you spread out the weight between two points (coulters + openers), more weight is needed.
The advantage IMO of a true no til drill like the LP-NT Series or an RTP Genesis is you can always plant regardless of the surface or condition (compacted/never broken ground, corn/milo trash, etc). Where something like a 3P500, you just have to be more selective.. FWIW - Weight is around 200lbs / set of openers on a 3P500. Compare to a SAYA 505 "no til drill" which has even less weight. Then add the coulters on top of that to spread that weight even further.. I'd take the LP every time