Is it true that obese people cannot have a laparoscopic gallbladder removal?

NO. I concur with dr tsai. Weight in and of itself is generally not contraindication to minimally invasive approaches to surgery. Patients with extremes of weight may be at increased risk of wound complications from open/larger incision approaches. The choice of surgical approach is one that should be based on complete review of risk factors and determination of safest and best risk/benefit ratio.