Commentators highlight that Israel's sin wasn't just idolatry, but worshipping in ways God had forbidden. They chose convenient and scenic 'high places' and shady groves, likely justifying it with good intentions. However, as John Calvin notes, God views any worship that disobeys His specific commands as spiritual adultery. This is a powerful reminder that true worship is rooted in obedience to God's Word, not our own preferences or man-made traditions.