The regulations just put a maximum; there is nothing preventing companies from offering lower hours if they wish. Before those maximums were brought in, you had the same situation as now, just with more hours being standard: you had to agree to 6-days-a-week, 10+ hour days, or nothing. The union movement successfully negotiated that down to 5-days-a-week, 8-hour days as a cap, which was at least an improvement.