The question of whether to allow cats outdoor access involves balancing welfare benefits of natural behavior expression against risks including road traffic, predation, disease, and wildlife impact.
Cat outdoor access welfare requires individualized assessment. A confident adult cat in a low-traffic rural area has very different risk-benefit calculations than an anxious cat on a busy road. The indoor enrichment deficit is real - indoor-only cats kept without adequate environmental enrichment develop welfare problems including obesity, boredom, and stress. The solution is not simple 'indoor versus outdoor' but rather an assessment of outdoor safety combined with compensation through enriched indoor environments for those cats that cannot safely free-roam. Catios represent a practical middle ground for many owners.