Use stretching tools instead of an elliptical machine when the goal is controlled mobility, targeted range, or support for tight areas rather than cardio conditioning. A strap, block, band, or wheel helps shape positions. An elliptical creates repeated low-impact movement for aerobic work.
The decision is not about which product is more useful overall. It is about the immediate workout need. Stretching tools make sense when the session needs range and control; elliptical machines make sense when the session needs steady conditioning.