Their loved ones may not know that they can voice an opinion about their preferences and may be happy to indulge their simple wishes.
Persistent yelling is alarming to family and friends and several explanations of what is happening may be required. If hand-over-hand assistance while sitting in a regular wheelchair is effective, they may be reassured and appreciate the opportunity to be involved in providing assistance.
They will probably be more successful in taking a regular wheelchair outside than a gel chair or tub because they are so heavy.